TM 1-1520-238-23
3-221
3.58.
PARKING BRAKE MASTER CYLINDER DISASSEMBLY/ASSEMBLY (AVIM) – continued
(2) Using high pressure fittings and adapters,
connect test stand pressure line (36) with in–
line shutoff valve (37). Connect 2500 psi
gage (38) to port (35).
(3) Repeat step b to ensure cylinder (3) is ser-
viced and bled with no leaks.
(4) Measure stroke at zero pressure. Stroke
must be 1.19 to 1.31 INCHES in one direc-
tion.
d. Perform proof pressure test.
(1) Compress cylinder (3) to 0.125 INCH.
(2) Apply 1500 psi to port (35) 5 MINUTES.
There must be no external leakage.
(3) Reduce pressure to zero. Remove pressure
line (36). Install plug (34).
(4) Remove cap (7) with packing (10). Install
pressure line (36).
GO TO NEXT PAGE
35
3
M04-2953-18
GAGE
37
36
38
TEST FIXTURE
PRESSURE
SOURCE
1.19 to
1.13 IN
3
GAGE
37
34
35
36
7
10
TEST FIXTURE
PRESSURE
SOURCE
M04-2953-19
0.125 IN
